Migrated several tests from blink to V8 repository.

test/webkit/regexp-alternatives.js

Index: test/webkit/regexp-alternatives.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/regexp-alternatives.js
similarity index 57%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/regexp-alternatives.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..b0e56001da60c3dcefe6841daba314bada4f3b6b 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/regexp-alternatives.js
@@ -22,10 +22,21 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 description(
-"Tests the behavior of Array.prototype.concat while the array is having a bad time due to one of the elements we are concatenating."
+'Test regular expression processing with alternatives.'
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+var s1 = "<p>content</p>";
+shouldBe('s1.match(/<((\\/([^>]+)>)|(([^>]+)>))/)', '["<p>","p>",undefined,undefined,"p>","p"]');
+shouldBe('s1.match(/<((ABC>)|(\\/([^>]+)>)|(([^>]+)>))/)', '["<p>","p>",undefined,undefined,undefined,"p>","p"]');
+shouldBe('s1.match(/<(a|\\/p|.+?)>/)', '["<p>","p"]');
 
+// Force YARR to use Interpreter by using iterative parentheses
+shouldBe('s1.match(/<((\\/([^>]+)>)|((([^>])+)>))/)', '["<p>","p>",undefined,undefined,"p>","p","p"]');
+shouldBe('s1.match(/<((ABC>)|(\\/([^>]+)>)|((([^>])+)>))/)', '["<p>","p>",undefined,undefined,undefined,"p>","p","p"]');
+shouldBe('s1.match(/<(a|\\/p|(.)+?)>/)', '["<p>","p","p"]');
 
+// Force YARR to use Interpreter by using backreference
+var s2 = "<p>p</p>";
+shouldBe('s2.match(/<((\\/([^>]+)>)|(([^>]+)>))\\5/)', '["<p>p","p>",undefined,undefined,"p>","p"]');
+shouldBe('s2.match(/<((ABC>)|(\\/([^>]+)>)|(([^>]+)>))\\6/)', '["<p>p","p>",undefined,undefined,undefined,"p>","p"]');
+shouldBe('s2.match(/<(a|\\/p|.+?)>\\1/)', '["<p>p","p"]');